Oh, "ich". Yeah... okay, the "official" (or normative, I suppose) pronunciation is clear, and those three sources really should agree (although I'm not sure about how the book is pronouncing anything at all ).

Apart from that, depending on the region, the ending "-ich" gets pronounced, as far as I've heard, two different ways... Aaand, letters fail me here. But the important point is, they are articulated almost identically. The placement of the tongue differs a tiny bit...

Oh, yeah, I'm at that stage in my learning where I pay attention to how exactly the tongue should be placed to produce a particular sound... I mean, I don't look into the mouths of native speakers. Mostly it's experimentation within my own mouth. Which must sound pretty weird.